Credit: NASA. Almost 30 years ago, a UN emergency panel banned the use of chlorofluorocarbons (CFCs) under the Montreal Protocol. Scientists had learned that these chlorine-containing chemicals had triggered the formation of a gaping hole in the ozone layer right above Antartica. Since then, the ozone layer has clearly recovered, marking a great success – … Continue reading NASA finds first direct proof that Ozone hole is recovering following chemical ban